2x+2y=36;6x+5y=100解得x=10,y=8的过程
{2分之x+y+3分之x-y=6 4(x+y)-5(x-y)=2方程组的解要有过程
2分之x+y+3分之x-y=6 4(x+y)-5(x-y)=2方程组的解要有过程
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
已知方程组2x-y=7,3x+y=8 x和y的解的过程
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
解方程组(x+y)(x-2y)=-5 (x-y)(x+2y)=7
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
解方程:3x+2y/4=2x+y/5=x-y+1/6要详细过程
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
解方程组x^2-y^2=x+y 4x^2-y^2+2x-y=0过程
5x+6y+3x-4y+3-x+x =5x+3x-x+x+6y-4y+3 =8x=2y+3 谁能告诉我这题合并同类项的解